The Grease Pencil glow effect holds out the stroke, even if the stroke is being obscured #70323

New Issue

Bent Hillerkus · 2019-09-28T13:02:07+02:00

Bent Hillerkus commented

2019-09-28 13:02:07 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30

Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-27 22:44, hash: 1c1a3198af

Short description of error
At first I thought that the effect doesn't care if the part of the stroke is actually visible or not, but that isn't the case: if you hide a GP object in another object it will disappear.
What I think is happening is that the effect holds out areas where there would be a stroke, but that check doesn't include whether or not that part of the stroke is actually being drawn (because it is obscured). I think the screenshots and the file might demonstrate it better.
All of the other effects seem to respect the geometry of the scene properly, so I think this is a bug and not a technical limitation.

Exact steps for others to reproduce the error

Add a Grease Pencil object.
Add some geometry that obscures it
Add the Glow effect

gp bug.blend

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30 **Blender Version** Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-27 22:44, hash: `1c1a3198af` **Short description of error** At first I thought that the effect doesn't care if the part of the stroke is actually visible or not, but that isn't the case: if you hide a GP object in another object it will disappear. What I think is happening is that the effect holds out areas where there would be a stroke, but that check doesn't include whether or not that part of the stroke is actually being drawn (because it is obscured). I think the screenshots and the file might demonstrate it better. All of the other effects seem to respect the geometry of the scene properly, so I think this is a bug and not a technical limitation. **Exact steps for others to reproduce the error** 1. Add a Grease Pencil object. 2. Add some geometry that obscures it 3. Add the Glow effect ![image.png](https://archive.blender.org/developer/F7778535/image.png) ![image.png](https://archive.blender.org/developer/F7778538/image.png) [gp bug.blend](https://archive.blender.org/developer/F7778537/gp_bug.blend)

Bent Hillerkus commented

2019-09-28 13:02:07 +02:00

Added subscriber: @bent

Antonio Vazquez was assigned by Germano Cavalcante

2019-10-01 19:26:47 +02:00

Antonio Vazquez was unassigned by Dalai Felinto

2019-12-23 13:49:02 +01:00

Dalai Felinto commented

2019-12-23 13:49:02 +01:00

Added subscriber: @antoniov

Antonio Vazquez commented

2019-12-28 09:54:46 +01:00

Closed as duplicate of #66293

Antonio Vazquez closed this issue

2019-12-28 09:54:46 +01:00

Gloria commented

2020-08-04 23:28:09 +02:00

Added subscriber: @GloriaTheAnimator-3

Gloria commented

2020-08-04 23:28:09 +02:00

how did you add the glow effect i need this?

Antonio Vazquez commented

2020-08-05 09:08:02 +02:00

@GloriaTheAnimator-3 You need go to the VFX panel. To display the effect, be sure to be in Render mode.

@GloriaTheAnimator-3 You need go to the VFX panel. To display the effect, be sure to be in Render mode. ![image.png](https://archive.blender.org/developer/F8747552/image.png)

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The Grease Pencil glow effect holds out the stroke, even if the stroke is being obscured #70323